American Racing Outlaw ii Rims

IMG_0536.JPG Ok,

So have decided I want these rims.

https://m.summitracing.com/search/product-line/american-racing-ar62-silver-outlaw-ii-wheels

I think I would like 15" on all four I believe (right now there is 14" on the front and 15" on the rear). In general people usually go the same size all the way around?

I just don't know how to determine the width or bolt pattern.

I want the biggest tires on back as possible and thinner ones up front.

Any help would be great.